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The Best Lemon Raspberry Swirl Bars

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Unveil the magic of The Best Lemon Raspberry Swirl Bars! Each bite explodes with sunny lemon zest and rich, swirled raspberry perfection atop a golden, buttery crust.

Ingredients

  • All-purpose flour: 1 ¾ cups, divided
  • Unsalted butter: ¾ cup (1 ½ sticks), cold and diced, plus 2 tablespoons melted
  • Granulated sugar: 1 ½ cups, divided
  • Large eggs: 3
  • Fresh lemon juice: ½ cup
  • Lemon zest: 2 tablespoons
  • Fresh or frozen raspberries: 1 ½ cups
  • Cornstarch: 1 tablespoon

Instructions

  1. Step 1: Prepare the crust. Preheat oven to 350°F (175°C). Line a 9×13 inch baking pan with parchment paper, leaving an overhang on the sides. In a medium bowl, combine 1 ½ cups all-purpose flour, ¼ cup granulated sugar, and a pinch of salt. Cut in ¾ cup cold, diced butter until the mixture resembles coarse crumbs. Press firmly and evenly into the prepared pan. Bake for 18-20 minutes, or until lightly golden, then remove from oven.
  2. Step 2: Make the raspberry swirl. While the crust bakes, combine raspberries, 2 tablespoons granulated sugar, and 1 teaspoon cornstarch in a small saucepan. Cook over medium heat, stirring frequently, until the raspberries break down and the mixture thickens to a jam-like consistency, about 5-7 minutes. Remove from heat and set aside to cool slightly.
  3. Step 3: Prepare the lemon filling. In a large bowl, whisk together the remaining 1 ¼ cups granulated sugar, 3 large eggs, fresh lemon juice, lemon zest, the remaining ¼ cup all-purpose flour, and 2 tablespoons melted butter until completely smooth and well combined.
  4. Step 4: Assemble the bars. Carefully pour the lemon filling evenly over the warm, pre-baked crust. Drop small dollops of the raspberry swirl mixture over the lemon filling.
  5. Step 5: Create the swirl and bake. Using a skewer or a thin knife, gently swirl the raspberry mixture into the lemon filling to create an attractive pattern. Return the pan to the oven and bake for an additional 25-30 minutes, or until the lemon filling is set and the edges are lightly golden. The center may still have a slight jiggle.
  6. Step 6: Cool and chill. Let the bars cool completely in the pan on a wire rack at room temperature. Once cooled, refrigerate for at least 2 hours (or preferably overnight) to allow them to firm up before lifting out of the pan using the parchment paper overhang, cutting into squares, and serving.

Notes

  • Keep these vibrant bars covered in an airtight container in the refrigerator for up to 4-5 days to maintain their delightful texture and freshness.
  • These bars are designed to be enjoyed chilled or at a cool room temperature; reheating is not recommended as it can alter the delicate consistency of the lemon filling.
  • For an elegant presentation, serve individual squares garnished with an extra fresh raspberry or a light dusting of powdered sugar.
  • When creating the swirl, use a light hand and avoid over-swirling the raspberry into the lemon filling to ensure distinct, beautiful patterns without muddling the colors.

Nutrition

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